package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.dto.SetmealDTO;
import com.sky.dto.SetmealPageQueryDTO;
import com.sky.entity.Dish;
import com.sky.entity.Setmeal;
import com.sky.entity.SetmealDish;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealDishMapper;
import com.sky.mapper.SetmealMapper;
import com.sky.result.PageResult;
import com.sky.service.SetmealService;
import com.sky.vo.SetmealVO;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.List;

/*
 * @author: 28380
 * @create: 2025/3/19 14:46
 * @desc:
 */
@Service
public class SetmealServiceImpl implements SetmealService {

    @Autowired
    private SetmealMapper setmealMapper;

    @Autowired
    private SetmealDishMapper setmealDishMapper;

    @Autowired
    private DishMapper dishMapper;

    /**
     * 新增套餐,同时需要保存套餐和菜品的关联关系
     * @param setmealDTO
     */
    public void saveWithDish(SetmealDTO setmealDTO) {
        // 保存套餐数据，操作setmeal，执行insert操作
        Setmeal setmeal = new Setmeal();
        BeanUtils.copyProperties(setmealDTO, setmeal);

        // 向套餐表中插入数据
        setmealMapper.insert(setmeal);

        //获取生成的套餐id
        Long id = setmeal.getId();

        //将生成的套餐id设置到setmealDishes中
        List<SetmealDish> setmealDishes = setmealDTO.getSetmealDishes();
        setmealDishes.forEach(setmealDish -> {
            setmealDish.setSetmealId(id);
        });

        //保存套餐和菜品的关联关系
        setmealDishMapper.insertBatch(setmealDishes);
    }


    /**
     * 分页查询套餐
     * @param setmealPageQueryDTO
     * @return
     */
    public PageResult pageQuery(SetmealPageQueryDTO setmealPageQueryDTO) {
        int pageNum = setmealPageQueryDTO.getPage();
        int pageSize = setmealPageQueryDTO.getPageSize();

        PageHelper.startPage(pageNum, pageSize);
        Page<SetmealVO> page = setmealMapper.pageQuery(setmealPageQueryDTO);

        return new PageResult(page.getTotal(), page.getResult());
    }


    /**
     * 批量删除套餐
     * @param ids
     */
    public void deleteBatch(List<Long> ids) {
        //根据id查看是否在启卖中
        ids.forEach(id->{
            Setmeal setmeal = setmealMapper.getById(id);
            if (setmeal.getStatus() == StatusConstant.ENABLE){
                // 在启售中，不能删除
                throw  new DeletionNotAllowedException(MessageConstant.SETMEAL_ON_SALE);
            }
        });

        ids.forEach(setmealId->{
            //删除套餐表中的数据
            setmealMapper.deleteById(setmealId);
            //删除套餐菜品关系表的数据
            setmealDishMapper.deleteBySetmealId(setmealId);
        });
    }

    /**
     * 根据id查询套餐
     * @param id
     * @return
     */
    public SetmealVO getByIdWithDish(Long id) {
        Setmeal setmeal = setmealMapper.getById(id);
        List<SetmealDish> setmealIdsByDishIds = setmealDishMapper.getBySetmeal(id);

        SetmealVO setmealVO = new SetmealVO();
        BeanUtils.copyProperties(setmeal,setmealVO);
        setmealVO.setSetmealDishes(setmealIdsByDishIds);
        return setmealVO;
    }

    /**
     * 修改套餐
     * @param setmealDTO
     */
    @Transactional
    public void update(SetmealDTO setmealDTO) {
        Setmeal setmeal = new Setmeal();
        BeanUtils.copyProperties(setmealDTO,setmeal);

        setmealMapper.update(setmeal);

        //获取套餐id
        Long id = setmealDTO.getId();

        //通过id将套餐菜品关系表中的数据删除
        setmealDishMapper.deleteBySetmealId(id);

        List<SetmealDish> setmealDishes = setmealDTO.getSetmealDishes();
        setmealDishes.forEach(setmealDish -> {
            setmealDish.setSetmealId(id);
        });
        //重新加入套餐菜品关系表
        setmealDishMapper.insertBatch(setmealDishes);

    }


    /**
     * 启售停售套餐
     * @param status
     * @param id
     */
    public void startOrStop(Integer status, Long id) {
        //对套餐中的菜品进行判断，如果有停售的菜品，那么套餐不能启售
        if(status == StatusConstant.DISABLE){
            List<Dish> dishList = dishMapper.getBySetmealId(id);
            if (dishList != null && dishList.size() > 0){
                dishList.forEach(dish -> {
                    if (dish.getStatus() == StatusConstant.DISABLE){
                        throw new DeletionNotAllowedException(MessageConstant.SETMEAL_ENABLE_FAILED);
                    }
                });
            }
        }

        Setmeal build = Setmeal.builder()
                .id(id)
                .status(status)
                .build();
        setmealMapper.update(build);

    }
}
